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甘肃省定西地区是一个干旱多灾、水资源缺乏的贫困山区,植被稀疏,“三料”俱缺,水土流失十分严重。为了改变生产条件,发展农业生产,全区兴修了200多万亩水平梯田。但是,新修梯田常出现增产幅度不大、甚至个别地块不增产的问题。因此,进行旱梯田培肥保墒高产稳产的试验研究有着重要的意义。我站从1974年开始这项试验研究以来,积累了大量的资料,取得初步成果。 试验布设在定西县城关公社安家沟流域和相邻的青岚公社大坪大队,属黄土丘陵沟壑区第四付区。海拔1950～2250米,年均气温6.3℃,4～9月气温日较差12.9℃,年≥10℃积温2239.1℃。年太阳辐射量141.4千卡/cm~2,年平均日照时数2408.6小时,无
Dingxi Prefecture, Gansu Province is a poor mountainous area suffering from drought and disaster and lack of water resources. The vegetation is sparsely populated and the “three materials” are deficient and the soil erosion is very serious. In order to change production conditions and develop agricultural production, over 2 million mu of terraced fields have been built in the whole district. However, the newly-repaired terraces often show the problem of not increasing the yield slightly or even increasing the production of individual plots. Therefore, it is of great significance to carry out experimental research on high yield and stable yield of fertility in dry terraced fields. Since I started this pilot study in 1974, I have accumulated a great deal of information and achieved initial results. The experimental layout in Dingxi County Chengguan commune Anjiagou watershed and neighboring Qinglan commune Daping brigade, a loess hilly and gully area fourth paid area. The elevation of 1950 ~ 2250 meters, the average annual temperature of 6.3 degrees Celsius, 4 to 9 months on the temperature of 12.9 degrees Celsius, annual ≥ 10 ℃ accumulated temperature 2239.1 ℃. Annual solar radiation 141.4 kcal / cm ~ 2, the average annual sunshine hours 2408.6 hours, without